Lineage/Impax G is a prescription medication that is used to treat a variety of conditions. The medication contains a combination of two active ingredients; gabapentin and enacarbil. Gabapentin is an anticonvulsant drug that works by reducing abnormal electrical activity in the brain. Enacarbil is a prodrug of gabapentin that is metabolized into gabapentin once it is taken. Uses of Lineage/Impax G: Lineage/Impax G is primarily used to treat epilepsy. It is also used to treat nerve pain caused by herpes virus or shingles (postherpetic neuralgia). Additionally, the medication is prescribed to treat restless leg syndrome (RLS) and certain types of seizures. Dosage of Lineage/Impax G: Lineage/Impax G comes in the form of a tablet that can be taken by mouth. The dosage typically starts low and gradually increases over time. The medication is usually taken two to three times a day with or without food. For the treatment of epilepsy in adults, the recommended starting dose is 600 mg taken once a day. The dose can be increased by 600 mg every three days until the maximum dose of 2400 mg/day is reached. For the treatment of RLS in adults, the recommended starting dose is 600 mg taken once a day. The dose can be increased by 600 mg every three days until the maximum dose of 1800 mg/day is reached. For the treatment of nerve pain caused by herpes virus or shingles in adults, the recommended starting dose is 600 mg taken three times a day. The dose can be increased by 600 mg every three days until the maximum dose of 3600 mg/day is reached. Side effects of Lineage/Impax G: Common side effects of Lineage/Impax G include drowsiness, dizziness, and swelling of the hands and feet. Other side effects may include fatigue, headache, diarrhea, dry mouth, and constipation. Serious side effects of Lineage/Impax G include suicidal thoughts, seizures, and allergic reactions. Interactions with other medications: Lineage/Impax G can interact with other medications. It is important to inform your doctor of all medications you are currently taking before starting to take Lineage/Impax G. Lineage/Impax G should not be taken with alcohol. Alcohol can increase the risk of drowsiness and dizziness that are both common side effects of the medication. Generic of Lineage/Impax G: Gabapentin enacarbil is the generic form of Lineage/Impax G. It is available under various brand names including Horizant and Regnite. Demographic of Lineage/Impax G: Lineage/Impax G is approved for use in adults only. The medication should not be used in children under the age of 18 years. The safety and effectiveness of Lineage/Impax G in pregnant women and nursing mothers are not well studied. Therefore, the medication should only be used in pregnant or nursing women if the benefits outweigh the risks.